Global Patent Index - EP 0737965 B1

EP 0737965 B1 20020327 - OPTICAL INFORMATION RECORDING MEDIUM AND ITS MANUFACTURING METHOD

Title (en)

OPTICAL INFORMATION RECORDING MEDIUM AND ITS MANUFACTURING METHOD

Title (de)

OPTISCHES AUFZEICHNUNGSMEDIUM UND VERFAHREN ZU DESSEN HERSTELLUNG

Title (fr)

SUPPORT D'ENREGISTREMENT D'INFORMATIONS OPTIQUES ET SON PROCEDE DE FABRICATION

Publication

EP 0737965 B1 20020327 (EN)

Application

EP 95935561 A 19951025

Priority

  • JP 9502190 W 19951025
  • JP 26428294 A 19941027

Abstract (en)

[origin: US5840395A] PCT No. PCT/JP95/02190 Sec. 371 Date Sep. 12, 1996 Sec. 102(e) Date Sep. 12, 1996 PCT Filed Oct. 25, 1995 PCT Pub. No. WO96/13834 PCT Pub. Date May 9, 1996The present invention is relative to an optical information recording medium having a reflective layer for reading out information signals by an optical technique. The optical information recording medium is formed as a plastic substrate. According to the present invention, the substrate is colored by admixture of a dyestuff for enabling instant judgment by the visual sense of the operator as to the contents of the optical information recording medium, for example, as to if the contents of the recording medium is a game program or the music information. If impurities such as dyestuffs are admixed, the optical system of the readout device is usually affected thus raising readout difficulties. Such ill effects on the optical system may be eliminated by setting the particle size of the dyestuff so as to be 50 mu m or less.

IPC 1-7

G11B 7/24; G11B 7/26; B29D 17/00

IPC 8 full level

B29D 11/00 (2006.01); B29C 45/00 (2006.01); B29D 17/00 (2006.01); G11B 7/253 (2006.01); G11B 7/26 (2006.01); G11B 23/40 (2006.01)

CPC (source: EP KR US)

B29C 45/0013 (2013.01 - EP US); B29D 17/005 (2013.01 - EP US); G11B 7/2533 (2013.01 - EP US); G11B 7/26 (2013.01 - EP KR US); G11B 23/40 (2013.01 - EP US); B29K 2995/002 (2013.01 - EP US); B29L 2017/003 (2013.01 - EP US); G11B 7/24 (2013.01 - EP US); G11B 7/2534 (2013.01 - EP US); Y10S 428/913 (2013.01 - EP US); Y10T 428/21 (2015.01 - EP US)

Citation (examination)

EP 0438225 A1 19910724 - FUJITSU LTD [JP]

Designated contracting state (EPC)

AT BE CH DE DK ES FR GB IT LI NL SE

DOCDB simple family (publication)

US 5840395 A 19981124; AT 215257 T 20020415; AU 3753595 A 19960523; AU 710022 B2 19990909; CN 1097259 C 20021225; CN 1137837 A 19961211; DE 69526066 D1 20020502; DE 69526066 T2 20021031; DK 0737965 T3 20020617; EP 0737965 A1 19961016; EP 0737965 A4 19971022; EP 0737965 B1 20020327; ES 2171197 T3 20020901; JP H08124212 A 19960517; KR 100387063 B1 20030814; KR 970700355 A 19970108; MX 9602322 A 19970430; MY 116381 A 20040131; WO 9613834 A1 19960509

DOCDB simple family (application)

US 66648196 A 19960912; AT 95935561 T 19951025; AU 3753595 A 19951025; CN 95191092 A 19951025; DE 69526066 T 19951025; DK 95935561 T 19951025; EP 95935561 A 19951025; ES 95935561 T 19951025; JP 26428294 A 19941027; JP 9502190 W 19951025; KR 19960703454 A 19960627; MX 9602322 A 19951025; MY PI9503218 A 19951026